a14b7873ee
Summary: Introduces a new class for managing write buffer memory across column families. We supplement ColumnFamilyOptions::write_buffer_size with ColumnFamilyOptions::write_buffer, a shared pointer to a WriteBuffer instance that enforces memory limits before flushing out to disk. Test Plan: Added SharedWriteBuffer unit test to db_test.cc Reviewers: sdong, rven, ljin, igor Reviewed By: igor Subscribers: tnovak, yhchiang, dhruba, xjin, MarkCallaghan, yoshinorim Differential Revision: https://reviews.facebook.net/D22581
33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
//
|
|
// Abstract interface for allocating memory in blocks. This memory is freed
|
|
// when the allocator object is destroyed. See the Arena class for more info.
|
|
|
|
#pragma once
|
|
#include <cstddef>
|
|
#include <cerrno>
|
|
|
|
namespace rocksdb {
|
|
|
|
class Logger;
|
|
|
|
class Allocator {
|
|
public:
|
|
virtual ~Allocator() {}
|
|
|
|
virtual char* Allocate(size_t bytes) = 0;
|
|
virtual char* AllocateAligned(size_t bytes, size_t huge_page_size = 0,
|
|
Logger* logger = nullptr) = 0;
|
|
|
|
virtual size_t BlockSize() const = 0;
|
|
};
|
|
|
|
} // namespace rocksdb
|